% pubman genre = article
@article{item_3258980,
title = {{New Caledonian Crows use mental representations to solve metatool problems}},
author = {Gruber, Romana and Schiestl, Martina and Boeckle, Markus and Frohnwieser, Anna and Miller, Rachael and Gray, Russell D. and Clayton, Nicola S. and Taylor, Alex H.},
language = {eng},
issn = {0960-9822},
doi = {10.1016/j.cub.2019.01.008},
publisher = {Cell Press},
address = {London, UK},
year = {2019},
date = {2019-02-18},
abstract = {{Summary{\textless}br{\textgreater}One of the mysteries of animal problem-solving is the extent to which animals mentally represent problems in their minds. Humans can imagine both the solution to a problem and the stages along the way [1, 2, 3], such as when we plan one or two moves ahead in chess. The extent to which other animals can do the same is far less clear [4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25]. Here, we presented New Caledonian crows with a series of metatool problems where each stage was out of sight of the others and the crows had to avoid either a distractor apparatus containing a non-functional tool or a non-functional apparatus containing a functional tool. Crows were able to mentally represent the sub-goals and goals of metatool problems: crows kept in mind the location and identities of out-of-sight tools and apparatuses while planning and performing a sequence of tool behaviors. This provides the first conclusive evidence that birds can plan several moves ahead while using tools.}},
journal = {{Current Biology}},
volume = {29},
number = {4},
pages = {686--692},
}